C++ pm_stay_awake函数代码示例

int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)
{
	int err;

	err = rtc_valid_tm(tm);
	if (err != 0)
		return err;

	err = rtc_valid_range(rtc, tm);
	if (err)
		return err;

	rtc_subtract_offset(rtc, tm);

	err = mutex_lock_interruptible(&rtc->ops_lock);
	if (err)
		return err;

	if (!rtc->ops)
		err = -ENODEV;
	else if (rtc->ops->set_time)
		err = rtc->ops->set_time(rtc->dev.parent, tm);
	else
		err = -EINVAL;

	pm_stay_awake(rtc->dev.parent);
	mutex_unlock(&rtc->ops_lock);
	/* A timer might have just expired */
	schedule_work(&rtc->irqwork);

	trace_rtc_set_time(rtc_tm_to_time64(tm), err);
	return err;
}

static irqreturn_t msm_ehci_host_wakeup_irq(int irq, void *data)
{

	struct msm_hcd *mhcd = data;

	mhcd->pmic_gpio_int_cnt++;
	dev_dbg(mhcd->dev, "%s: hsusb host remote wakeup interrupt cnt: %u\n",
			__func__, mhcd->pmic_gpio_int_cnt);


	pm_stay_awake(mhcd->dev);

	if (mhcd->pmic_gpio_dp_irq_enabled) {
		mhcd->pmic_gpio_dp_irq_enabled = 0;
		disable_irq_wake(irq);
		disable_irq_nosync(irq);
	}

	if (!atomic_read(&mhcd->pm_usage_cnt)) {
		atomic_set(&mhcd->pm_usage_cnt, 1);
		pm_runtime_get(mhcd->dev);
	}

	return IRQ_HANDLED;
}

static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
{
	struct gpio_button_data *bdata = dev_id;
#ifdef CONFIG_SEC_DEBUG
	int state = (gpio_get_value(bdata->button->gpio) ? 1 : 0) ^ bdata->button->active_low;
	sec_debug_check_crash_key(bdata->button->code, state);
#endif

	BUG_ON(irq != bdata->irq);

	if (suspend_state) {
		irq_in_suspend = true;
		wakeup_reason = bdata->button->code;
		pr_info("%s before resume by %d\n", __func__, wakeup_reason);
	}

	if (bdata->button->wakeup)
		pm_stay_awake(bdata->input->dev.parent);
	if (bdata->timer_debounce)
		mod_timer(&bdata->timer,
			jiffies + msecs_to_jiffies(bdata->timer_debounce));
	else
		schedule_work(&bdata->work);

	return IRQ_HANDLED;
}

static irqreturn_t gpio_keys_gpio_isr(int irq, void *dev_id)
{
	struct gpio_button_data *bdata = dev_id;

	BUG_ON(irq != bdata->irq);

	if (bdata->button->wakeup) {
		const struct gpio_keys_button *button = bdata->button;

		pm_stay_awake(bdata->input->dev.parent);
		if (bdata->suspended  &&
		    (button->type == 0 || button->type == EV_KEY)) {
			/*
			 * Simulate wakeup key press in case the key has
			 * already released by the time we got interrupt
			 * handler to run.
			 */
			input_report_key(bdata->input, button->code, 1);
		}
	}

	mod_delayed_work(system_wq,
			 &bdata->work,
			 msecs_to_jiffies(bdata->software_debounce));

	return IRQ_HANDLED;
}

/**
 * rtc_timer_remove - Removes a rtc_timer from the rtc_device timerqueue
 * @rtc rtc device
 * @timer timer being removed.
 *
 * Removes a timer onto the rtc devices timerqueue and sets
 * the next alarm event appropriately.
 *
 * Clears the enabled bit on the removed timer.
 *
 * Must hold ops_lock for proper serialization of timerqueue
 */
static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer)
{
	struct timerqueue_node *next = timerqueue_getnext(&rtc->timerqueue);

	timerqueue_del(&rtc->timerqueue, &timer->node);
	trace_rtc_timer_dequeue(timer);
	timer->enabled = 0;
	if (next == &timer->node) {
		struct rtc_wkalrm alarm;
		int err;

		next = timerqueue_getnext(&rtc->timerqueue);
		if (!next) {
			rtc_alarm_disable(rtc);
			return;
		}
		alarm.time = rtc_ktime_to_tm(next->expires);
		alarm.enabled = 1;
		err = __rtc_set_alarm(rtc, &alarm);
		if (err == -ETIME) {
			pm_stay_awake(rtc->dev.parent);
			schedule_work(&rtc->irqwork);
		}
	}
}

int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)
{
	int err;

	err = rtc_valid_tm(tm);
	if (err != 0)
		return err;

	err = mutex_lock_interruptible(&rtc->ops_lock);
	if (err)
		return err;

	if (!rtc->ops)
		err = -ENODEV;
	else if (rtc->ops->set_time)
		err = rtc->ops->set_time(rtc->dev.parent, tm);
	else if (rtc->ops->set_mmss64) {
		time64_t secs64 = rtc_tm_to_time64(tm);

		err = rtc->ops->set_mmss64(rtc->dev.parent, secs64);
	} else if (rtc->ops->set_mmss) {
		time64_t secs64 = rtc_tm_to_time64(tm);
		err = rtc->ops->set_mmss(rtc->dev.parent, secs64);
	} else
		err = -EINVAL;

	pm_stay_awake(rtc->dev.parent);
	mutex_unlock(&rtc->ops_lock);
	/* A timer might have just expired */
	schedule_work(&rtc->irqwork);
	return err;
}

static irqreturn_t imx_keypad_irq_handler(int irq, void *dev_id)
{
	struct imx_keypad *keypad = dev_id;
	unsigned short reg_val;

	reg_val = readw(keypad->mmio_base + KPSR);

	/* Disable both interrupt types */
	reg_val &= ~(KBD_STAT_KRIE | KBD_STAT_KDIE);
	/* Clear interrupts status bits */
	reg_val |= KBD_STAT_KPKR | KBD_STAT_KPKD;
	writew(reg_val, keypad->mmio_base + KPSR);

	if (keypad->enabled) {
		pm_stay_awake(keypad->input_dev->dev.parent);
		/* The matrix is supposed to be changed */
		keypad->stable_count = 0;

		/* Schedule the scanning procedure near in the future */
		mod_timer(&keypad->check_matrix_timer,
			  jiffies + msecs_to_jiffies(2));
	}

	return IRQ_HANDLED;
}

static irqreturn_t bu21150_irq_thread(int irq, void *dev_id)
{
	struct bu21150_data *ts = dev_id;
	u8 *psbuf = (u8 *)ts->frame_work;

	mutex_lock(&ts->mutex_wake);

	if (!ts->stay_awake && ts->wake_up &&
			ts->scan_mode == AFE_SCAN_GESTURE_SELF_CAP) {
		pm_stay_awake(&ts->client->dev);
		ts->stay_awake = true;
	}

	mutex_unlock(&ts->mutex_wake);

	/* get frame */
	ts->frame_work_get = ts->req_get;
	bu21150_read_register(REG_READ_DATA, ts->frame_work_get.size, psbuf);

	if (ts->reset_flag == 0) {
#ifdef CHECK_SAME_FRAME
		check_same_frame(ts);
#endif
		copy_frame(ts);
		wake_up_frame_waitq(ts);
	} else {
		ts->reset_flag = 0;
	}

	return IRQ_HANDLED;
}

/*
 * switch to host: -> MTU3_VBUS_OFF --> MTU3_ID_GROUND
 * switch to device: -> MTU3_ID_FLOAT --> MTU3_VBUS_VALID
 */
static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx,
	enum mtu3_vbus_id_state status)
{
	struct ssusb_mtk *ssusb =
		container_of(otg_sx, struct ssusb_mtk, otg_switch);
	struct mtu3 *mtu = ssusb->u3d;

	dev_dbg(ssusb->dev, "mailbox state(%d)\n", status);

	switch (status) {
	case MTU3_ID_GROUND:
		switch_port_to_host(ssusb);
		ssusb_set_vbus(otg_sx, 1);
		ssusb->is_host = true;
		break;
	case MTU3_ID_FLOAT:
		ssusb->is_host = false;
		ssusb_set_vbus(otg_sx, 0);
		switch_port_to_device(ssusb);
		break;
	case MTU3_VBUS_OFF:
		mtu3_stop(mtu);
		pm_relax(ssusb->dev);
		break;
	case MTU3_VBUS_VALID:
		/* avoid suspend when works as device */
		pm_stay_awake(ssusb->dev);
		mtu3_start(mtu);
		break;
	default:
		dev_err(ssusb->dev, "invalid state\n");
	}
}

void bcmsdh_dev_pm_stay_awake(bcmsdh_info_t *bcmsdh)
{
#if !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36))
	bcmsdh_os_info_t *bcmsdh_osinfo = bcmsdh->os_cxt;
	pm_stay_awake(bcmsdh_osinfo->dev);
#endif /* !defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 36)) */
}

static irqreturn_t titsc_irq(int irq, void *dev)
{
	struct titsc *ts_dev = dev;
	struct input_dev *input_dev = ts_dev->input;
	unsigned int fsm, status, irqclr = 0;
	unsigned int x = 0, y = 0;
	unsigned int z1, z2, z;

	status = titsc_readl(ts_dev, REG_RAWIRQSTATUS);
	if (status & IRQENB_HW_PEN) {
		ts_dev->pen_down = true;
		irqclr |= IRQENB_HW_PEN;
		pm_stay_awake(ts_dev->mfd_tscadc->dev);
	}

	if (status & IRQENB_PENUP) {
		fsm = titsc_readl(ts_dev, REG_ADCFSM);
		if (fsm == ADCFSM_STEPID) {
			ts_dev->pen_down = false;
			input_report_key(input_dev, BTN_TOUCH, 0);
			input_report_abs(input_dev, ABS_PRESSURE, 0);
			input_sync(input_dev);
			pm_relax(ts_dev->mfd_tscadc->dev);
		} else {
			ts_dev->pen_down = true;
		}
		irqclr |= IRQENB_PENUP;
	}

	if (status & IRQENB_EOS)
		irqclr |= IRQENB_EOS;

	/*
	 * ADC and touchscreen share the IRQ line.
	 * FIFO1 interrupts are used by ADC. Handle FIFO0 IRQs here only
	 */
	if (status & IRQENB_FIFO0THRES) {

		titsc_read_coordinates(ts_dev, &x, &y, &z1, &z2);

		if (ts_dev->pen_down && z1 != 0 && z2 != 0) {
			/*
			 * Calculate pressure using formula
			 * Resistance(touch) = x plate resistance *
			 * x postion/4096 * ((z2 / z1) - 1)
			 */
			z = z1 - z2;
			z *= x;
			z *= ts_dev->x_plate_resistance;
			z /= z2;
			z = (z + 2047) >> 12;

			if (z <= MAX_12BIT) {
				input_report_abs(input_dev, ABS_X, x);
				input_report_abs(input_dev, ABS_Y, y);
				input_report_abs(input_dev, ABS_PRESSURE, z);
				input_report_key(input_dev, BTN_TOUCH, 1);
				input_sync(input_dev);
			}
		}

static irqreturn_t msm_async_irq(int irq, void *data)
{
	struct msm_hcd *mhcd = data;
	int ret;

	mhcd->async_int_cnt++;
	dev_dbg(mhcd->dev, "%s: hsusb host remote wakeup interrupt cnt: %u\n",
			__func__, mhcd->async_int_cnt);

	pm_stay_awake(mhcd->dev);

	spin_lock(&mhcd->wakeup_lock);
	if (mhcd->async_irq_enabled) {
		mhcd->async_irq_enabled = 0;
		disable_irq_wake(irq);
		disable_irq_nosync(irq);
	}
	spin_unlock(&mhcd->wakeup_lock);

	if (!atomic_read(&mhcd->pm_usage_cnt)) {
		ret = pm_runtime_get(mhcd->dev);
		if ((ret == 1) || (ret == -EINPROGRESS))
			pm_runtime_put_noidle(mhcd->dev);
		else
			atomic_set(&mhcd->pm_usage_cnt, 1);
	}

	return IRQ_HANDLED;
}

static int mxhci_hsic_resume(struct mxhci_hsic_hcd *mxhci)
{
	struct usb_hcd *hcd = hsic_to_hcd(mxhci);
	int ret;
	unsigned long flags;

	if (!mxhci->in_lpm) {
		dev_dbg(mxhci->dev, "%s called in !in_lpm\n", __func__);
		return 0;
	}

	pm_stay_awake(mxhci->dev);

	/* enable force-on mode for periph_on */
	clk_set_flags(mxhci->system_clk, CLKFLAG_RETAIN_PERIPH);

	if (mxhci->bus_perf_client) {
		mxhci->bus_vote = true;
		queue_work(mxhci->wq, &mxhci->bus_vote_w);
	}

	spin_lock_irqsave(&mxhci->wakeup_lock, flags);
	if (mxhci->wakeup_irq_enabled) {
		disable_irq_wake(mxhci->wakeup_irq);
		disable_irq_nosync(mxhci->wakeup_irq);
		mxhci->wakeup_irq_enabled = 0;
	}

	if (mxhci->pm_usage_cnt) {
		mxhci->pm_usage_cnt = 0;
		pm_runtime_put_noidle(mxhci->dev);
	}
	spin_unlock_irqrestore(&mxhci->wakeup_lock, flags);


	ret = regulator_set_voltage(mxhci->hsic_vddcx, mxhci->vdd_low_vol_level,
			mxhci->vdd_high_vol_level);
	if (ret < 0)
		dev_err(mxhci->dev,
			"unable to set nominal vddcx voltage (no VDD MIN)\n");


	clk_prepare_enable(mxhci->system_clk);
	clk_prepare_enable(mxhci->cal_clk);
	clk_prepare_enable(mxhci->hsic_clk);
	clk_prepare_enable(mxhci->utmi_clk);
	clk_prepare_enable(mxhci->core_clk);

	if (mxhci->wakeup_irq)
		usb_hcd_resume_root_hub(hcd);

	mxhci->in_lpm = 0;

	dev_dbg(mxhci->dev, "HSIC-USB exited from low power mode\n");
	xhci_dbg_log_event(&dbg_hsic, NULL, "Controller resumed", 0);

	return 0;
}

/**
 * rtc_update_irq - Triggered when a RTC interrupt occurs.
 * @rtc: the rtc device
 * @num: how many irqs are being reported (usually one)
 * @events: mask of RTC_IRQF with one or more of RTC_PF, RTC_AF, RTC_UF
 * Context: any
 */
void rtc_update_irq(struct rtc_device *rtc,
		    unsigned long num, unsigned long events)
{
	if (IS_ERR_OR_NULL(rtc))
		return;

	pm_stay_awake(rtc->dev.parent);
	schedule_work(&rtc->irqwork);
}

static int link_pm_runtime_get_active(struct link_pm_data *pm_data)
{
	int ret;
	struct usb_link_device *usb_ld = pm_data->usb_ld;
	struct device *dev = &usb_ld->usbdev->dev;

	if (!usb_ld->if_usb_connected || usb_ld->ld.com_state == COM_NONE)
		return -ENODEV;

	if (pm_data->dpm_suspending) {
		mif_err("Kernel in suspending try get_active later\n");
		/* during dpm_suspending..
		 * if AP get tx data, wake up. */
#ifdef CONFIG_HAS_WAKELOCK
		wake_lock(&pm_data->l2_wake);
#else
		pm_stay_awake(pm_data->miscdev.this_device);
#endif
		return -EAGAIN;
	}

	if (dev->power.runtime_status == RPM_ACTIVE) {
		pm_data->resume_retry_cnt = 0;
		return 0;
	}

	if (!pm_data->resume_requested) {
		mif_debug("QW PM\n");
		queue_delayed_work(pm_data->wq, &pm_data->link_pm_work, 0);
	}
	mif_debug("Wait pm\n");
	INIT_COMPLETION(pm_data->active_done);
	ret = wait_for_completion_timeout(&pm_data->active_done,
						msecs_to_jiffies(500));

	/* If usb link was disconnected while waiting ACTIVE State, usb device
	 * was removed, usb_ld->usbdev->dev is invalid and below
	 * dev->power.runtime_status is also invalid address.
	 * It will be occured LPA L3 -> AP iniated L0 -> disconnect -> link
	 * timeout
	 */
	if (!usb_ld->if_usb_connected || usb_ld->ld.com_state == COM_NONE) {
		mif_info("link disconnected after timed-out\n");
		return -ENODEV;
	}

	if (dev->power.runtime_status != RPM_ACTIVE) {
		mif_info("link_active (%d) retry\n",
						dev->power.runtime_status);
		return -EAGAIN;
	}
	mif_debug("link_active success(%d)\n", ret);
	return 0;
}